.gitignore

+*~

README.md

-# Retrofit Singer
+# Retrofit Singer 331K104
+
+## Machine Specifications
+
+* single needle straight lock-stitch 301
+* suits, shirts, skirts and other clothing
+* Max Speed: 2200 stitch/mm
+* Production circa 1967
+
+* https://www.manualslib.com/manual/154045/Singer-331k1.html
+
+## Retrofit
+
+* A sewing machine only turns one way, turn wheel toward operator / anti-clock
+  Forward/Backward sewing is done mechanically (hook movement reversed)
+
+### Add a rotary position sensor on the wheel
+
+* To detect needle position : up, down
+  can be two cams with a slotted optical sensor
+* To get a tachometer signal for speed control
+  can be a holed wheel with a slotted optical sensor
+
+* AMS AS5132 Rotary Sensor
+  8.5-bit rotary position sensor with digital angle (interface), ABI, UVW (up to 6 pole pairs) and PWM output
+  https://ams.com/as5132
+
+  360 positions per revolution
+  Serial interface
+  PWM output
+  Incremental output with adjustable number of pulses
+  Max RPM 72_900
+
+* AMS AS5134
+  https://ams.com/as5134
+  https://ams.com/as5134#tab/shop-now
+  https://www.mouser.fr/Search/Refine?Keyword=ams+AS5134
+  ZSST / ZSSM ??? tape/reel ???
+  8$/unit
+
+### Motor Driver
+
+AC Line
+* https://en.wikipedia.org/wiki/IEC_60038
+* V RMS = 230 V +/- 10% = [207, 253] V
+  $V_RMS = \frac{V_Peak}{\sqrt(2)}$
+  V Peak = 325 V max to 358 V
+* 50Hz
+
+* STM - Improved Universal Motor Drive
+  https://www.st.com/resource/en/application_note/cd00003829-improved-universal-motor-drive-stmicroelectronics.pdf
+* NXP - Open Loop Universal Motor Chopper Based 2004
+  schema with transformless and push-pull BJT for IGBT
+  https://www.nxp.com/docs/en/reference-manual/DRM057.pdf
+* ON Semi - Low Cost Universal Chopper Drive System
+  https://www.onsemi.com/pub/Collateral/AN1661-D.PDF
+* DC Drive for Universal Motor
+  http://www.komel.katowice.pl/ZRODLA/FULL/84/ref_02.pdf
+* STM - Motor control Reference Guide 2021
+  https://www.st.com/content/ccc/resource/sales_and_marketing/promotional_material/brochure/bf/aa/d0/60/38/83/43/74/Brochure_Motor_Control.pdf/files/Brochure_Motor_Control.pdf/jcr:content/translations/en.Brochure_Motor_Control.pdf
+
+* https://www.st.com/en/power-transistors.html
+* https://www.st.com/content/st_com/en/products/power-transistors/power-mosfets.html
+  https://www.st.com/en/power-transistors/stpower-n-channel-mosfets-gt-350-v-to-700-v.html
+* https://www.st.com/content/st_com/en/products/power-transistors/igbts.html
+  https://www.st.com/en/power-transistors/600v-h-series-medium-speed-8-to-30-khz.html
+* https://www.st.com/en/motor-drivers/gate-drivers.html
+* https://www.st.com/en/motor-drivers/brushed-dc-motor-drivers.html#documentation
+
+* https://www.infineon.com/cms/en/product/power/igbt/igbt-discretes/?filterValues=~(444_84_max~(leftBound~5~rightBound~15))&visibleColumnIds=name,opn,productStatusInfo,green,orderOnline,698_min,698_max,618,496_max,444_85_max,444_84_max,662_nom,551,397_nom,396_61_nom,460_max,550_nom,641,packageName,669_nom,673_nom,668_nom,670_nom,548_nom,463_max,476_nom,220_nom,449_max,694_nom,693#!products
+
+* STM STGB10H60DF Trench gate field-stop IGBT, H series 600 V, 10 A high speeda
+  https://www.st.com/en/power-transistors/stgb10h60df.html
+
+* https://www.infineon.com/cms/en/product/power/gate-driver-ics/1edi05i12af/
+
+* https://design.infineon.com
+
+* https://makingcircuits.com/blog/making-a-transformerless-power-supply-circuit/
+* https://www.homemade-circuits.com/cheap-yet-useful-transformerless-power/
+* https://www.powerelectronicsnews.com/power-supply-design-notes-transformer-less-power-supply/
+
+* https://www.powersystemsdesign.com/articles/the-art-of-generating-negative-voltages/95/9756
+* https://www.newelectronics.co.uk/electronics-technology/the-best-way-to-generate-a-negative-voltage-for-your-system/167618/
+  https://www.ti.com/product/TPS63710
+
+* Designing for Board Level Electromagnetic Compatibility - NXP
+  https://www.nxp.com/docs/en/application-note/AN2321.pdf
+* https://incompliancemag.com/article/emi-in-components/
+* https://www.maximintegrated.com/en/design/technical-documents/tutorials/1/1167.html
+* https://www.ti.com/lit/an/snoa382/snoa382.pdf?ts=1619383422967
+
+* https://www.quora.com/Why-would-you-place-a-capacitor-parallel-to-a-resistor
+
+* https://en.wikipedia.org/wiki/Insulated-gate_bipolar_transistor
+
+* Fundamentalsof MOSFETand IGBT Gate Driver Circuits - TI
+  https://www.ti.com/lit/ml/slua618a/slua618a.pdf?ts=1619353660538
+* Isolated Gate Drivers—What, Why, and How? - Analog
+  https://www.analog.com/en/analog-dialogue/articles/isolated-gate-drivers-what-why-and-how.html
+
+> The structure of an IGBT/power MOSFET is such that the gate forms a nonlinear capacitor. Charging
+  the gate capacitor turns the power device on and allows current flow between its drain and source
+  terminals, while discharging it turns the device off and a large voltage may then be blocked
+  across the drain and source terminals. The minimum voltage when the gate capacitor is charged and
+  the device can just about conduct is the threshold voltage (VTH). For operating an IGBT/power
+  MOSFET as a switch, a voltage sufficiently larger than VTH should be applied between the gate and
+  source/emitter terminals.
+
+> Consider a digital logic system with a microcontroller that can output a PWM signal of 0 V to 5 V
+  on one of its I/O pins. This PWM would not be enough to fully turn on a power device used in power
+  systems, as its overdrive voltage generally exceeds the standard CMOS/TTL logic voltage. Thus, an
+  interface is needed between the logic/control circuitry and the high power device.
+
+## Examples of Machine Specifications
+
+### Janome S9
+
+* 1000 stitch/mm
+
+### ZOJE ZJ-A6000-G
+
+* Glasman 550,00€ HT
+
+### JUKI DDL-8700
+
+* https://www.glasman.fr/a227/machine-a-coudre-industrielle-piqueuse-plate-juki-ddl8700-ddl8700.html
+  820,00€ HT
+* Matière ordinaire moyenne
+* Longueur maximal du point: 5mm
+* 5500 stitch/mm
+* table 105,110 ou 120cm sur 55 ou 60cm
+* SERVO Moteur éléctronique silencieux 220V
+
+## Motor Retrofit
+
+* https://www.glasman.fr/c9435/pieces-detachees/machine-a-coudre-indutriellle/moteurs
+
+* Moteur éléctronique pour machine à coudre industrielle POWERMAX AHU 27-55 200-240V 5000 tours/min 550W
+  300 €/TTC
+  https://www.glasman.fr/a12024/moteur-electronique-machine-a-coudre-insdustrielle.html
+
+* Positionneur d'aiguille pour machine à coudre SYNCHRONIZER
+  Boite de synchronizer externe, positionneur d'aiguille en bas de couture pour travail de précision
+  Adaptable sur moteur powermax de machine à coudre électronique.
+  29 €/TTC
+  **Se monte sur le volant**

plot-singer-motor.py → measures/plot-dc-motor.py

@@ -54,6 +54,9 @@ Rbelt = Dmotor / Dmachine # = 0.6 # Fixme: R = 0.6 / 2 ???
 CVmotor = 1/6 # 1 CV = 735.5 W et 1 HP = 745.7 W
 Wmotor = 735.5 * CVmotor # = 123 W
 
+Un_MOTOR = 220
+RPM_MAX = 2200 # stitch/mm
+
 ####################################################################################################
 
 class DataUnloaded:
@@ -90,22 +93,28 @@ def axis2to1(x):
 
 fig, ax = plt.subplots(constrained_layout=True)
 
+# x_array = np.array((0, Un_MOTOR))
+# slope = RPM_MAX / Un_MOTOR
+# ax.plot(x_array, (x_array - 30) * slope , '--b', label='')
+ax.plot((30, Un_MOTOR), (1*60, RPM_MAX), '--b', label='expected RPM on AC line')
+
 ax.plot(DataUnloaded.U_array, DataUnloaded.I_array*1000, 'o', label=r'I unloaded')
 ax.plot(DataUnloaded.U_array, DataUnloaded.rpm_array, 'o', label=r'RPM unloaded')
 x_array = np.arange(10, 90, 10)
 # ax.plot(DataUnloaded.U_array, DataUnloaded.U_slope*DataUnloaded.U_array + DataUnloaded.U_cst, '--k')
 # ax.plot(DataUnloaded.U_array, (DataUnloaded.I_slope*DataUnloaded.U_array + DataUnloaded.I_cst)*1000, '--k')
 ax.plot(x_array, DataUnloaded.U_slope*x_array + DataUnloaded.U_cst, '--k')
-ax.plot(x_array, (DataUnloaded.I_slope*x_array + DataUnloaded.I_cst)*1000, '--k')
+ax.plot(x_array, (DataUnloaded.I_slope*x_array + DataUnloaded.I_cst)*1000, '--r')
 
 ax.plot(DataWheel.U_array, DataWheel.I_array*1000, 'o', label=r'I wheel')
 ax.plot(DataWheel.U_array, DataWheel.rpm_array, 'o', label=r'RPM wheel')
 x_array = np.arange(20, 250, 10)
 # ax.plot(DataWheel.U_array, DataWheel.U_slope*DataWheel.U_array + DataWheel.U_cst, '--k')
 ax.plot(x_array, DataWheel.U_slope*x_array + DataWheel.U_cst, '--k')
-ax.plot(x_array, (DataWheel.I_slope*x_array + DataWheel.I_cst)*1000, '--k')
+ax.plot(x_array, (DataWheel.I_slope*x_array + DataWheel.I_cst)*1000, '--r')
 
 ax.set_xlim([0, 250])
+ax.set_ylim([0, 2500])
 ax.xaxis.set_major_locator(ticker.MultipleLocator(5))
 ax.yaxis.set_major_locator(ticker.MultipleLocator(500))
 ax.xaxis.set_minor_locator(ticker.MultipleLocator(1))
@@ -133,6 +142,8 @@ ax.text(62.5, 410, r'RPM wheel/unloaded = {:.1f}'.format(DataWheel.U_slope/DataU
 
 ax.axhline(y=1000)
 ax.axhline(y=1600)
+ax.axhline(y=RPM_MAX)
+ax.text(10, RPM_MAX + 10, r'RPM max 2200', fontsize=14)
 # ax.axhline(y=5500) # DDL-8700 JUKI 5,500 point/mm
 
 plt.show()